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Potential Environmental Influences in Soil by Accidental Fluorine (F) Leakage, Using Leaching Test

용출시험을 통한 불산 누출사고지역의 토양 내 불소(F)의 거동특성

  • Kim, Doyoung (Environmental Engineering Section, The Catholic University of Korea) ;
  • Lee, Junseok (Seoul Center, Korea Basic Science Institute, Republic of Korea) ;
  • Kwon, Eunhye (Environmental Engineering Section, The Catholic University of Korea) ;
  • Lee, Hyun A (Seoul Center, Korea Basic Science Institute, Republic of Korea) ;
  • Yoon, Hye-On (Seoul Center, Korea Basic Science Institute, Republic of Korea) ;
  • Lee, Sanghoon (Environmental Engineering Section, The Catholic University of Korea)
  • 김도영 (가톨릭대학교 생명공학과 환경공학전공) ;
  • 이준석 (한국기초과학지원연구원) ;
  • 권은혜 (가톨릭대학교 생명공학과 환경공학전공) ;
  • 이현아 (한국기초과학지원연구원) ;
  • 윤혜온 (한국기초과학지원연구원) ;
  • 이상훈 (가톨릭대학교 생명공학과 환경공학전공)
  • Received : 2015.02.27
  • Accepted : 2015.04.30
  • Published : 2015.04.30

Abstract

Various leaching tests were applied to the soil affected by accidental leakage of HF in an industrial area in Korea. Three different leaching methods including pH-stat, continuous batch leaching, and column tests were adopted to assess leaching characteristics and mobility of fluorine(F) in soil and the potential risks to ecosystem. Both natural and spiked samples were used for the leaching tests. F concentrations in the batch tests increased by leaching rapidly in the early stage of leaching and then maintained rather constant levels. Column leaching test also show similar result to that of the batch test. pH also controlled the leaching behavior of the soil. With increasing pH, more F was released in the pH-stat test. This is mainly due to the competition and exchange with hydroxyl ions, as pH increase to the alkaline range. Most of the F released by the accident seem to have removed in the very early stage of leaching, whereas some natural proportion from soil minerals are thought to have been released very slowly. Therefore, little F released during the accident remained, based on the results of this study on the samples after two years of the accident. We could conclude that soil contaminated by external effects such as chemical accidents should be managed immediately, especially with F.

Acknowledgement

Supported by : 환경부

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